Scale.



S. E. EKLUND.

SCALE.

APPLICATION FILED APR.15. 1912.

Patented July 2, 1918.

UNITED STATES PATENT. OFFICE.

' STONE E. EKLUND, OF TOLEDO, OHIO, ASSIGNOR TO THE TOLEDO SCALE COMPANY, OF

TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

SCALE.

Specification of Letters Patent.

Patented July 2, 1918.

Application filed April 15, 1912. Serial No. 690,792.

pendulum scales, that is to say, to scales which comprise a beam upon which is mounted. the scale pan or platter to receive the goods or article to be weighed, and which is so connected to a pendulum that the move ment of the beam under any weight imposed upon the scale pan or platform displaces the pendulum until equilibrium in the system is restored. My inventlon conslsts in its broader aspect in a scale of this character in which the beam is a lever of the first order, or, in other words, fulcrumed between the scale pan and the connectlon to the pendulum counter-balance, and the last named element is pendant or in its lower position when there is no weight upon the scale pan and the scale is in equilibrium. Another important feature of my 1nvent1on relates to the adjustment of the pendulum, and still other features will appear from the following specification taken in connection with the drawing and are ointed out in the following claims. In t e accompanying drawings, I have shown a specific form of scale embodyin my invention and 1n the following spec-i cation I have described 1t in detail; but it is to be understood that the specific disclosure is for the purpose of exemplification only, and my invention is not limited thereto, but is defined inthe following claims.

Referring now to the drawing: Figure 1 is a side elevation of a scale embodying my invention, the casing thereof being partly broken away to show the interior mechanism; Fig. 2 is a detail elevation upon an enlarged scale partly in section upon the line 2-2, Fig. 1; Fig. 3 is a vertical section on the line 33 of Fig. 1; and Fig. 4 is a horizontal section upon the line 44 of Fig. 1. Each part is identified by the same symbol of reference wherever it occurs in the figures.

In the particular embodiment shown, the base 5, casing 6 and indicating cylinder 7 are or may be substantially as in scales of this character in the prior art, though it is to be understood that my invention is not llmlted to use in connection with scales having cylinder indicators. The beam 8 of the scale is fulcrumed upon vertical supports 9, whlch may be cast integral with the base, as shown, and carries at the end of its shorter arm a scale pan or platform 10, and at the end of its longer arm is connected to the counter-balancing pendulum 11 and the indicating cylinder 7 As usual in scales of this character, the pivots of the beam fulcrum 12 and the scale pan fulcrum 13 are knife edges, as shown in dotted lines and in the present lnstance the horizontal position of the scale pan is achieved by means of a high check comprising a forwardly'extending arm 14 upon the scale pan support 15, an upright 16 secured at the outer end of the arm by means of screws 17 and a check link 18 pivoted at one end to the upright and at its other end to an adjustable post 19 secured to a lug 20 formed on the interior of the housing. The form of the housing 6 is immaterial, but, in the present instance, it is watch shaped in general outline, but provided with a flared base 21 and a neck 22, which supports the cylinder casing 7. An opening is provided in the edge of the casing through which enter both the end ofthe scale beam and the arm which supports the upright of the check mechanism, the latter being directly above the former; The end of the long arm of the scale beam within the casing is formed with j a perpendicular offset 23 to which is attached a rack rod 24 which carries the rack 25, meshing with a pinion 26 upon the cylinder indicator. At its lower end the rack rod 24 is tapped into a boss 25 upon a casting 26 which is pivoted by means of a yoke 27 upon a pin28 1n the lugs 29 and 30 of the offset end of the beam or lever. The casting is also formed with an enlargement 31 which projects upon that side of the rack rod upon which the rack teeth are formed, and by its weight serves to hold the rack in operative engagement with its pinion. Lock nut 32 insures the screw connection of the rod and'casting. At the junction between the main body of the beam 8 and its oflset portion and in the median line or axis of the beam is mounted a cone 33 which projects upward and serves as a bearing for the thrust rod 34. The latter engages at its upper end the pendulum arm or stem and at its lower end is formed with a lateral bend 36, forming a recess into which eiztends the adjustable thumb screw 37, which is formed with a concave bearing for the cone 33 upon the scale beam. This thumb screw 37 is tapped into the shoulder at the inner "end of the lateral bend and the outer end of said'bend is tapped to receive an adjustable thumb screw 38, which is so ad usted as to prevent the cone 33 leaving its seat in the thumb screw 37 but yet to permit ample motion of the parts. Intermediate its ends the thrust rod 34 is laterally curved or offset, asshown at 39, so thatit ma not interfere wlth the action of the pendu umb" The l'atter consists of the arm 35, before mentioned, and pendulum rod 40 and the pendulum weight 41, the rod being tapped at 1ts upper end into a boss 42 of a casting which comprlses also a split sleeve 43 having lugs 44. The arm 35 is formed at its outer end with a lateral boss 45, which is received within the split sleeve 43, whereby the arm and pendulum rod are angularly adjustable with relation to each,

other, and, when the desired adjustment is secured, it may be maintained by a screw 46 tapped into the lugs of the split sleeve. At

its inner end the pendulum arm 35 iso rovided with a knife 47, the edge of which is upwardly directed and engages agates 48 carried in a bracket 49 projecting from the casing, as shown in Fig. 1. Intermediate its ends, the pendulum arm is provided with a knife 50 having a downwardly directed;

edge which engages agates 52 carried in'a housing 53 upon the upper end of the thrust rod. The operation of the scale will now be apparent. The weight of the pendulum and its arm are borneupon the upper end of the thrust rod, and the knife which engages the stationary agates is held in contact therewith by a pressure just sufficlent to prevent displacement when the scale is empty and in equilibrium. This adjustment may be readily made by adjustin the angular relation of the pendulum ro to the pendulum arm, it being understood that theweight of the scale an and its attached parts is suflicient under the conditions of leverage to slightly overbalance the weight of the parts at the outer end of the long arm of the scale beam. The addition of weight to the scale pan causes the long arm to rise and lift the pendulum to a position where the latter counterbalances the weight upon the scale pan and restores equilibrium. The indicator chart is in the meantime shifted cor-' respondingly to show I the weight of the article being weighed.

In this construction the lever is readily brought into equilibrium with no weightin the pan, for the weight of the scale pan, its support and the check mechanism are so related to those of a pendulum, thrust bar and other parts upon the long end of the beam that the same are equally counterbalanced by reason of the difference in leverage of the tWo arms of the lever. The scale furthermore may be very readily sealed by adjusting the members of the pendulum with relation to each other about their pivot joint.

I claim:

'1. In a weighing scale, a lever of the first order having a long and a short arm, a goods receiver mounted on the short arm, a pendulum, and a thrust rod having a cone and socket connection with the long arm of the lever and connected to and adapted to raise the pendulum when a load is placed on the goods receiver.

2. In a weighing scale, a lever of the first order having a long and a short arm, a goods receiver, mounted on the short arm, a pendulum having a bearing substantially above the long arm of the lever, and a thrust rod interposed between the pendulum and the lever having a knife bearing with one of said elements and a cone and socket bearing with the other of said elements.

3. In a weighing scale, a lever having a angular pendulum, a knife bearing between.

the pendulum and the frame and a thrust rod between the pendulum and the long arm of the lever. v

5. In a weighing scale, a lever of the first order, having a long and a short arm, a

goods receiver mounted on the short arm thereof, a pendulum having a' bearing intermediate its ends, a thrust rod connected to the long arm of the beam and engaging the bearing on the pendulum to raise the latter.

6. In a weighing scale, a beam constituting a lever of the first order having a long and a short arm, a goods receiver connected to the short arm of the lever, a lateral extension formed integral with the end of the long arm of the lever, an indicator, connections from said lateral extension to the indicator, a pendulum pivoted above the lever, and a thrust rod connected to the lever and to the pendulum at a point intermediate the ends of the latter.

7. In a weighing scale, a lever of the first order having a long and a short arm, a goods receiver mounted on the short arm of the lever, a pendulum articulated intermediate its ends, and a thrust rod interposed between the lever and the pendulum and adapted toraise thelatter when a load is imposed upon the receiver.

a laterally extendin v tially vertical rod, t e rod and arm being the lever, a pendulum pivoted intermediate its ends upon the thrust rod, a stationary bearing and a pivot upon the pendulum cooperating therewith.

10. A weighing scale comprising a lever of the first order having a long and a short arm, a thrust rod connected to the long arm, a pendulum pivotally mounted upon the thrust rod, a downwardly faced bearing upon a stationary part of the scale, a pivot upon the pendulum engaging and bearing upwardly against said bearing and a goods receiver mounted upon the short arm of the leverand adjusted to slightly overbalance the weight upon the long arm of the lever.

11. In a weighing scale, a lever,.a goods receptacle thereon, a pendulum comprising arm and a substanangularly adjustable with relation to each other and the arm pivoted independently of the lever to a stationary part of the scale and connections between the lever and arm.

12. in a weighing scale, a lever of the first order having along and a short arm, a goods receiver mounted on the short arm of the lever, a pendulum pivoted independently of the lever and comprising a laterally extending arm and a rod there being an adjustable pivotal connection between the arm and rod, and a thrust rod between the long arm of the lever and said pendulum arm.

13. In a weighing scale, a lever 8 of the first order a scale pan 10, a pendulum comprising an arm pivoted at 47 to a stationary part of the frame, a rod angularly adjustable with relation to the arm and a weight 41, the arm having a pivot knife intermediate its ends, and a thrust rod engaging the lever and the knife upon the pendulum and arm.

14. In a weighing scale, a lever, a goods receptacle thereon, a pendulum, a thrust rod interposed between the lever and pendulum and comprising a curved body portion 39, a housing at the upper end of the thrust rod having bearings which engage the pendulum and an ofiset bend at the lower end receiving in its recess an end of the lever, and operating between the lever and thrust bar.

STQNE E. EKLUND. I

Witnesses:

OsoAR E. BARRINGER, 31D. BURKHOLDER. 

